Trisodium phosphorothioate

Reversible blocking of SH groups can be obtained through the formation of unsymmetrical disulfides with a variety of sulfenyl halides, for example, 4-nitrophenylsulfenyI chloride (177), SS cleavage with trisodium phosphorothioate (178), or protection with mercury compounds such as p-mercury benzoic acid (179). In each case the free SH groups can be regenerated with mercaptans. 

Aminopropylamino)ethanol Hydrobromic acid Trisodium phosphorothioate... 

The 5 -deoxy-5 -thioanalogues of AMP and IMP, (12) and (13), have been prepared by condensing trisodium phosphorothioate with the appropriate 5 -iodo-5 -deoxynucleoside. Both are hydrolysed by weak acetic acid, or by alkaline phosphatase, to give the S -thionucleosides, but are stable to snake... 

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